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Understanding ADHD: Is It a Mental Illness or Not? How Diet Can Influence Focus and Mood

Attention-Deficit/Hyperactivity Disorder, or ADHD, is a neurodevelopmental condition that affects how the brain regulates focus, impulse control, and energy management. Nutrition can influence these processes, with certain dietary patterns supporting attention and mood regulation. 

It comes in three main types: inattentive, hyperactive-impulsive, and combined. Genetics are primary in its development, but environmental factors, early nutrition, and childhood development also play a role.

Globally, ADHD is estimated to affect about 11% of children and 4% of adults [1,2]. ADHD is one of the most well-known conditions, yet still misunderstood. Even psychologists and neuroscientists debate whether ADHD is a mental illness, and the opinions vary.

Attention-Deficit/Hyperactivity Disorder, or ADHD, is a neurodevelopmental condition that affects how the brain regulates focus, impulse control, and energy management. Nutrition can influence these processes, with certain dietary patterns supporting attention and mood regulation. 

It comes in three main types: inattentive, hyperactive-impulsive, and combined. Genetics are primary in its development, but environmental factors, early nutrition, and childhood development also play a role.

Globally, ADHD is estimated to affect about 11% of children and 4% of adults [1,2]. ADHD is one of the most well-known conditions, yet still misunderstood. Even psychologists and neuroscientists debate whether ADHD is a mental illness, and the opinions vary.

Attention-Deficit/Hyperactivity Disorder, or ADHD, is a neurodevelopmental condition that affects how the brain regulates focus, impulse control, and energy management. Nutrition can influence these processes, with certain dietary patterns supporting attention and mood regulation. 

It comes in three main types: inattentive, hyperactive-impulsive, and combined. Genetics are primary in its development, but environmental factors, early nutrition, and childhood development also play a role.

Globally, ADHD is estimated to affect about 11% of children and 4% of adults [1,2]. ADHD is one of the most well-known conditions, yet still misunderstood. Even psychologists and neuroscientists debate whether ADHD is a mental illness, and the opinions vary.

Frustrated girl doing homework

Is ADHD a Mental Illness, Yes or No?

No. The most accurate way to describe ADHD is that it is a neurodevelopmental disorder, as also said in the DSM-5 [3]. As a comprehensive neurodevelopmental disorder, ADHD impactsmental health, but it is not caused by poor mental well-being. Because of its effects on mental health, ADHD may be called a mental illness, but it doesn’t reflect the true meaning of the disorder.

Because of the confusion, whether ADHD is a disorder or a norm, many people (un)intentionally ignore the early mental health signs of ADHD and don’t get diagnosed. This explains growing interest in an ADHD test based on psychological frameworks. A 2024 survey also explains why online evaluations are so popular by showing that 25% of Americans suspect they might have ADHD [4].

The confusion comes from neurological roots, involving differences in brain structure and chemistry, but from manifestations as mental health symptoms, such as anxious thoughts, rumination, depressive episodes, and sleep problems.

Why ADHD Is Not a Mental Illness

While ADHD is labeled as an illness or a disorder, many experts and the general public now view it as a neurodivergence (a variation of the norm)rather than a disorder that needs to be addressed. There are a few reasons for that: people with attention deficits are not "broken," attention problems are on the rise nowadays, and decreased mental health is not a cause of ADHD.

ADHD Is Neurodivergence

More and more people advocate that individuals with ADHD simply have brains that process information differently. Once they adapt their environments, for example, by using flexible schedules, visual reminders, or supportive technologies, they excel in fast-paced and creative roles. There is also a growing in popularity opinion that the world (schools, workplaces, stores, technologies, etc.) should adapt to ADHDers to be inclusive, not vice versa.

Attention Challenges Are More Common Than Ever

Distraction affects almost everyone, especially with the world built to attract human attention at every step. Some of the possible mental health, non-ADHD-related cases of attention problems are:

  • Mental health conditions (anxiety, depression, BPD)
  • Sleep Deprivation
  • Stress and low tolerance to frustration, as seen in article. This co-occurring condition is also known as Rejection Sensitivity Dysphoria (RSD). 
  • Overstimulation from technology and multitasking
  • Medical conditions.
  • Age-related cognitive decline.

This makes it harder to identify clinical ADHD without proper evaluation. Some people believe that "everybody has a little ADHD." Distinguishing ADHD from other attention problems is indeed very hard, even with formal testing and a consultation with a professional.

ADHD is Neurological, not Psychiatric

ADHD is not a mental illness because it has to do with how the brain grows and works. Nutrients such as omega-3 fatty acids, iron, zinc, and magnesium enhance these neurological pathways, indicating that diet can influence symptom management, despite ADHD not being attributable to poor mental health.

A question should be reworded in a debate about whether ADHD is a mental illness. We know that ADHD can make mental health worse, but we also know that bad mental health doesn't cause ADHD. This confirms that ADHD is primarily a neurological variation, despite its symptoms potentially overlapping with mental health issues.

Why Some Consider ADHD a Mental Illness

While ADHD can be seen as a form of neurodivergence, it is also recognized in clinical and medical communities as a neurodevelopmental disorder. This classification doesn't mean people with ADHD are "broken," but rather that the condition can significantly impact life without proper understanding or support. Here's why ADHD is considered a disorder:

ADHD Is in The DSM-5

The Diagnostic and Statistical Manual of Mental Disorders (DSM-5) is used worldwide by clinicians as the most authoritative and credible diagnostic criteria. And it includes ADHD, which is classified as a neurodevelopmental disorder. Its presence there means that ADHD disrupts mental health, but access to therapies and medications can improve the symptoms.

It Can Disrupt Daily Life

If you don't treat your ADHD, it could make your work, school, and relationships worse. Not meeting deadlines, making snap decisions, or having trouble paying attention during important conversations can all make you feel bad and lower your self-esteem, which is why the link between mental health and ADHD seems so clear. This disruption can cause long-term stress and make personal and work relationships worse.

ADHD Brains Function Differently

The brains of a neurotypical person vs. an individual with ADHD will differ in three ways: structure, function, and neurochemical activity. The (prefrontal)frontal cortex, responsible for planning and attention, and the amygdala, responsible for memory, are often smaller in size in ADHD brains [5]. The function difference is that neurodivergent brains are less interconnected. And differences in neurochemical activity relate to the production of dopamine, which is dysregulated for ADHDers.

Overlapping Conditions

Without support, ADHD can increase the risk of anxiety, depression, and substance use disorders. It's another reason that confirms that ADHD is a disorder, as mental health is affected, and the consequences may be dangerous for physical well-being.

Symptoms Respond to Treatment

Medications and therapy can reduce symptoms, but complementary strategies also play a role. A diet rich in protein, essential fatty acids, and micronutrients can support focus, stabilize energy, help manage hyperactivity and mood swings, and improve daily functioning.

ADHD Is Recognized as a Disability

ADHD can make you eligible for disability accommodations in a lot of places, like the U.S., Canada, and the U.K. These include flexible work hours, help with money, or help with school, since the condition can make it hard to do things without proper management.

These reasons don't mean to call people with ADHD "sick" or "disabled." People who have trouble paying attention can get tools, treatments, and accommodations that help them reach their full potential when they understand ADHD as a disorder. This also helps to reduce stigma and shame.

Calling ADHD an "illness" stigmatizes and confuses. It is more accurate to see it as a condition that needs awareness, adaptation, and support. People with ADHD can lead balanced and fulfilling lives by accepting the strengths that come with their neurodivergence when they get the right diagnosis and treatment.

Exploring the Role of Nutritional Support in ADHD Manifestations

While ADHD is neurological rather than a mental illness, lifestyle factors — including diet — can influence how symptoms appear. Below are a few recommendations from a trusted mental health app, Breeze Wellbeing, without any disruptive strategies, but with the same effectiveness:

  • Nutritional support may help improve focus, mood regulation, and energy levels. Diets rich in protein, omega-3 fatty acids, complex carbohydrates, and micronutrients like zinc, iron, and magnesium can support brain function and stabilize attention. 
  • Minimizing processed foods, excessive sugar, and artificial additives may also reduce hyperactivity or mood swings. 

Combined with therapy, exercise, and structured routines, mindful nutrition can be a practical tool for managing ADHD in daily life.

Sources:

  1. Data and Statistics on ADHD. CDC. November 2024.
  2. Attention-Deficit/Hyperactivity Disorder (ADHD). National Institute of Mental Health. 2014.
  3. ADHD in the DSM-5-TR: What has changed and what has not. Frontiers in Psychiatry. 2023.
  4. Survey finds 25% of adults suspect they have undiagnosed ADHD. The Ohio State University Wexner Medical Center. October 2024.
  5. The brain anatomy of attention-deficit/hyperactivity disorder in young adults – a magnetic resonance imaging study. PLoS One. April 2017.
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